[I2C] Split mv643xx I2C platform support
The motivation for this change is to allow other chips, like the Marvell Orion ARM SoC family, to use the existing i2c-mv64xxx driver. Signed-off-by: Tzachi Perelstein <tzachi@marvell.com> Acked-by: Nicolas Pitre <nico@marvell.com> Acked-by: Dale Farnsworth <dale@farnsworth.org> Acked-by: Mark A. Greer <mgreer@mvista.com> Acked-by: Jean Delvare <khali@linux-fr.org>
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60ce1c2006
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a0832798c0
4 changed files with 42 additions and 24 deletions
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@ -648,7 +648,7 @@ config I2C_PCA_ISA
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config I2C_MV64XXX
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tristate "Marvell mv64xxx I2C Controller"
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depends on MV64X60 && EXPERIMENTAL
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depends on (MV64X60 || ARCH_ORION) && EXPERIMENTAL
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help
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If you say yes to this option, support will be included for the
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built-in I2C interface on the Marvell 64xxx line of host bridges.
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@ -1,6 +1,6 @@
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/*
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* Driver for the i2c controller on the Marvell line of host bridges for MIPS
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* and PPC (e.g, gt642[46]0, mv643[46]0, mv644[46]0).
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* Driver for the i2c controller on the Marvell line of host bridges
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* (e.g, gt642[46]0, mv643[46]0, mv644[46]0, and Orion SoC family).
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*
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* Author: Mark A. Greer <mgreer@mvista.com>
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*
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@ -14,7 +14,7 @@
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#include <linux/spinlock.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/mv643xx.h>
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#include <linux/mv643xx_i2c.h>
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#include <linux/platform_device.h>
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#include <asm/io.h>
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@ -86,6 +86,7 @@ struct mv64xxx_i2c_data {
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u32 cntl_bits;
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void __iomem *reg_base;
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u32 reg_base_p;
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u32 reg_size;
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u32 addr1;
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u32 addr2;
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u32 bytes_left;
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@ -463,17 +464,20 @@ static int __devinit
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mv64xxx_i2c_map_regs(struct platform_device *pd,
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struct mv64xxx_i2c_data *drv_data)
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{
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struct resource *r;
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int size;
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struct resource *r = platform_get_resource(pd, IORESOURCE_MEM, 0);
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if ((r = platform_get_resource(pd, IORESOURCE_MEM, 0)) &&
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request_mem_region(r->start, MV64XXX_I2C_REG_BLOCK_SIZE,
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drv_data->adapter.name)) {
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if (!r)
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return -ENODEV;
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drv_data->reg_base = ioremap(r->start,
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MV64XXX_I2C_REG_BLOCK_SIZE);
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drv_data->reg_base_p = r->start;
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} else
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return -ENOMEM;
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size = r->end - r->start + 1;
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if (!request_mem_region(r->start, size, drv_data->adapter.name))
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return -EBUSY;
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drv_data->reg_base = ioremap(r->start, size);
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drv_data->reg_base_p = r->start;
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drv_data->reg_size = size;
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return 0;
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}
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@ -483,8 +487,7 @@ mv64xxx_i2c_unmap_regs(struct mv64xxx_i2c_data *drv_data)
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{
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if (drv_data->reg_base) {
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iounmap(drv_data->reg_base);
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release_mem_region(drv_data->reg_base_p,
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MV64XXX_I2C_REG_BLOCK_SIZE);
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release_mem_region(drv_data->reg_base_p, drv_data->reg_size);
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}
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drv_data->reg_base = NULL;
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@ -15,6 +15,7 @@
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#include <asm/types.h>
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#include <linux/mv643xx_eth.h>
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#include <linux/mv643xx_i2c.h>
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/****************************************/
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/* Processor Address Space */
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@ -863,7 +864,6 @@
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/* I2C Registers */
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/****************************************/
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#define MV64XXX_I2C_CTLR_NAME "mv64xxx_i2c"
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#define MV64XXX_I2C_OFFSET 0xc000
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#define MV64XXX_I2C_REG_BLOCK_SIZE 0x0020
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@ -968,14 +968,6 @@ struct mpsc_pdata {
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u32 brg_clk_freq;
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};
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/* i2c Platform Device, Driver Data */
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struct mv64xxx_i2c_pdata {
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u32 freq_m;
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u32 freq_n;
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u32 timeout; /* In milliseconds */
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u32 retries;
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};
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/* Watchdog Platform Device, Driver Data */
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#define MV64x60_WDT_NAME "mv64x60_wdt"
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23
include/linux/mv643xx_i2c.h
Normal file
23
include/linux/mv643xx_i2c.h
Normal file
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@ -0,0 +1,23 @@
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/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#ifndef _MV64XXX_I2C_H_
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#define _MV64XXX_I2C_H_
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#include <linux/types.h>
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#define MV64XXX_I2C_CTLR_NAME "mv64xxx_i2c"
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/* i2c Platform Device, Driver Data */
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struct mv64xxx_i2c_pdata {
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u32 freq_m;
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u32 freq_n;
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u32 timeout; /* In milliseconds */
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u32 retries;
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};
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#endif /*_MV64XXX_I2C_H_*/
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